Cotton pillowcases are said to catch your skin because they don't allow skin to slide. On the other hand, silk pillowcases are said to let your skin breathe, while not pulling at the skin. Lying face down could also cause aging.

RELATED: Odd things people do in their sleep

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Oddest things people do in their sleep

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Oddest things people do in their sleep

Sleep eating

Nocturnal sleep-related eating disorder is characterized by people sleep walking to their kitchens and eating. Often times, they have no recollection of it, and only realize when they discover messes and missing food.

Sometimes, the patient has severe weight gain and other health issues attributed to the disorder.

Frequently, the foods eaten are high in fat, sugar and carbohydrates. Furthermore, people with the disorder create bizarre food combinations with the items they have access to in their kitchen.

Nordstrom reviewer says "I noticed the sleep mask helps me fall asleep quicker than I have in ages and I feel more rested when I wake up... I highly recommend Slipsilk's and I don't think you'll regret it."

Amazon reviewer says "This mask is comfortable and perfectly contoured to hug your face without leaving marks, disrupting sleep, or letting any unwanted light. I'll have to get another one since my husband keeps stealing mine!"